A set of data consists of the following scores: 7, 3, 9, 5, 4

For these data, compute the following value:

Σ X

Sole with work in 10 years, the average number of hours of tv watched per week by teenagers dropped from 23.9 to 21.4. find the percent of change.

Simplify the expression. -2/5(10+15m-20n)

The power generated by an electrical circuit (in watts) as a function of its current c (in amperes) is modeled by p(c)= -15c(c-8) what current will produce the maximum power?